Abnormal circuit operation detection system

An abnormality in operation is detected by meticulously monitoring the operation of a monitored device that comprises a state machine. The state number, indicating the state the monitored device is currently in, is output from the device. The upper and lower limit values of current consumption is se...

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Bibliographische Detailangaben
Hauptverfasser: YASUI TAKANORI, HASHIMOTO CHIKASHI, IWAKI HIROYUKI, HASHIZUME MASATO, IKEDA YOSHIHISA
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An abnormality in operation is detected by meticulously monitoring the operation of a monitored device that comprises a state machine. The state number, indicating the state the monitored device is currently in, is output from the device. The upper and lower limit values of current consumption is set for each state number. A monitoring circuit, using the upper and lower limit values for the present state number, judges the value of current consumption detected by a current detection circuit and detects whether there is abnormality in operation.